Hi Hans,
Thank you for the patch.
On 8/17/2016 14:29, Hans Verkuil wrote:
From: Hans Verkuil <hans.verk...@cisco.com>
This patch converts the atmel-isi driver from a soc-camera driver to a driver
that is stand-alone.
Signed-off-by: Hans Verkuil <hans.verk...@cisco.com>
---
drivers/media/platform/soc_camera/Kconfig | 3 +-
drivers/media/platform/soc_camera/atmel-isi.c | 1216 +++++++++++++++----------
2 files changed, 721 insertions(+), 498 deletions(-)
diff --git a/drivers/media/platform/soc_camera/Kconfig
b/drivers/media/platform/soc_camera/Kconfig
index 39f6641..f74e358 100644
--- a/drivers/media/platform/soc_camera/Kconfig
+++ b/drivers/media/platform/soc_camera/Kconfig
@@ -54,9 +54,8 @@ config VIDEO_SH_MOBILE_CEU
config VIDEO_ATMEL_ISI
tristate "ATMEL Image Sensor Interface (ISI) support"
- depends on VIDEO_DEV && SOC_CAMERA
+ depends on VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API && OF && HAS_DMA
depends on ARCH_AT91 || COMPILE_TEST
- depends on HAS_DMA
select VIDEOBUF2_DMA_CONTIG
---help---
This module makes the ATMEL Image Sensor Interface available
diff --git a/drivers/media/platform/soc_camera/atmel-isi.c
b/drivers/media/platform/soc_camera/atmel-isi.c
index 30211f6..9947acb 100644
--- a/drivers/media/platform/soc_camera/atmel-isi.c
+++ b/drivers/media/platform/soc_camera/atmel-isi.c
@@ -22,18 +22,22 @@
<snip>
@@ -305,26 +292,21 @@ static int queue_setup(struct vb2_queue *vq,
unsigned int *nbuffers, unsigned int *nplanes,
unsigned int sizes[], struct device
*alloc_devs[])
{
- struct soc_camera_device *icd = soc_camera_from_vb2q(vq);
- struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
- struct atmel_isi *isi = ici->priv;
+ struct atmel_isi *isi = vq->drv_priv;
It's better to use vb2_get_drv_priv.
struct atmel_isi *isi = vb2_get_drv_priv(vq);
unsigned long size;
- size = icd->sizeimage;
+ size = isi->fmt.fmt.pix.sizeimage;
- if (!*nbuffers || *nbuffers > MAX_BUFFER_NUM)
- *nbuffers = MAX_BUFFER_NUM;
-
- if (size * *nbuffers > VID_LIMIT_BYTES)
- *nbuffers = VID_LIMIT_BYTES / size;
+ /* Make sure the image size is large enough. */
+ if (*nplanes)
+ return sizes[0] < size ? -EINVAL : 0;
*nplanes = 1;
sizes[0] = size;
- isi->sequence = 0;
isi->active = NULL;
- dev_dbg(icd->parent, "%s, count=%d, size=%ld\n", __func__,
+ dev_dbg(isi->dev, "%s, count=%d, size=%ld\n", __func__,
*nbuffers, size);
return 0;
<snip>
+static int isi_open(struct file *file)
+{
+ struct atmel_isi *isi = video_drvdata(file);
+ struct v4l2_subdev *sd = isi->entity.subdev;
+ int ret;
+
+ if (mutex_lock_interruptible(&isi->lock))
+ return -ERESTARTSYS;
+
+ ret = v4l2_fh_open(file);
+ if (ret < 0)
+ goto unlock;
+
+ if (!v4l2_fh_is_singular_file(file))
+ goto unlock;
+
+ ret = v4l2_subdev_call(sd, core, s_power, 1);
+ if (ret < 0 && ret != -ENOIOCTLCMD)
+ goto unlock;
v4l2_fh_release should be called on error;
+
+ ret = isi_set_fmt(isi, &isi->fmt);
+ if (ret)
+ v4l2_subdev_call(sd, core, s_power, 0);
+unlock:
+ mutex_unlock(&isi->lock);
+ return ret;
+}
+
<snip>
+
+static int isi_graph_notify_complete(struct v4l2_async_notifier *notifier)
+{
+ struct atmel_isi *isi = notifier_to_isi(notifier);
+ int ret;
+
+ ret = v4l2_device_register_subdev_nodes(&isi->v4l2_dev);
+ if (ret < 0) {
+ dev_err(isi->dev, "Failed to register subdev nodes\n");
+ return ret;
+ }
+
+ isi->vdev->ctrl_handler = isi->entity.subdev->ctrl_handler;
+ isi->entity.config = v4l2_subdev_alloc_pad_config(isi->entity.subdev);
isi->entity.config maybe assigned to 'NULL'. It's better to add code to
judge its value.
+ ret = isi_formats_init(isi);
+ if (ret) {
+ dev_err(isi->dev, "No supported mediabus format found\n");
+ return ret;
+ }
+ isi_camera_set_bus_param(isi);
+
+ ret = isi_set_default_fmt(isi);
+ if (ret) {
+ dev_err(isi->dev, "Could not set default format\n");
+ return ret;
+ }
+
+ ret = video_register_device(isi->vdev, VFL_TYPE_GRABBER, -1);
+ if (ret) {
+ dev_err(isi->dev, "Failed to register video device\n");
+ return ret;
+ }
+
+ dev_info(isi->dev, "Device registered as %s\n",
+ video_device_node_name(isi->vdev));
+ return 0;
+}
+
<snip>
+
static int atmel_isi_probe(struct platform_device *pdev)
{
int irq;
struct atmel_isi *isi;
+ struct vb2_queue *q;
struct resource *regs;
int ret, i;
- struct soc_camera_host *soc_host;
isi = devm_kzalloc(&pdev->dev, sizeof(struct atmel_isi), GFP_KERNEL);
if (!isi) {
@@ -1044,20 +1216,65 @@ static int atmel_isi_probe(struct platform_device *pdev)
return ret;
isi->active = NULL;
- spin_lock_init(&isi->lock);
+ isi->dev = &pdev->dev;
+ mutex_init(&isi->lock);
+ spin_lock_init(&isi->irqlock);
INIT_LIST_HEAD(&isi->video_buffer_list);
INIT_LIST_HEAD(&isi->dma_desc_head);
+ q = &isi->queue;
+
+ /* Initialize the top-level structure */
+ ret = v4l2_device_register(&pdev->dev, &isi->v4l2_dev);
+ if (ret)
+ return ret;
+
+ isi->vdev = video_device_alloc();
+ if (isi->vdev == NULL) {
+ ret = -ENOMEM;
+ goto err_vdev_alloc;
+ }
If video device is unregistered, the ISI driver must be reloaded when
registering a new video device.
So '*vdev' can be replaced by 'vdev', or move the code above to
isi_graph_notify_complete.
+
+ /* video node */
+ isi->vdev->fops = &isi_fops;
+ isi->vdev->v4l2_dev = &isi->v4l2_dev;
+ isi->vdev->queue = &isi->queue;
+ strlcpy(isi->vdev->name, KBUILD_MODNAME, sizeof(isi->vdev->name));
+ isi->vdev->release = video_device_release;
+ isi->vdev->ioctl_ops = &isi_ioctl_ops;
+ isi->vdev->lock = &isi->lock;
+ isi->vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING |
+ V4L2_CAP_READWRITE;
+ video_set_drvdata(isi->vdev, isi);
+
+ /* buffer queue */
+ q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ q->io_modes = VB2_MMAP | VB2_READ | VB2_DMABUF;
+ q->lock = &isi->lock;
+ q->drv_priv = isi;
+ q->buf_struct_size = sizeof(struct frame_buffer);
+ q->ops = &isi_video_qops;
+ q->mem_ops = &vb2_dma_contig_memops;
+ q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
+ q->min_buffers_needed = 2;
+ q->dev = &pdev->dev;
+
+ ret = vb2_queue_init(q);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "failed to initialize VB2 queue\n");
+ goto err_vb2_queue;
+ }
Regards,
Songjun Wu
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